S-35390A Seiko Instruments, S-35390A Datasheet - Page 23

• Manufacturer Part Number: S-35390A
• Description: 2-Wire Real Time Clock
• Manufacturer: Seiko Instruments

2-WIRE REAL-TIME CLOCK
Rev.1.2
S-35390A
_00
(6) During power-on detector operation
When power is applied to this IC, power-on detection circuit operates, status register_1 is set to “80h”
(bit 7 (POC flag) of status register_1 is set to 1) via the power-on detection circuit, and a 1 Hz clock is
output from the INT1 pin.
INT2AE = INT2ME = INT2FE = 32kE = INT1AE = INT1ME = 0
Change by reset command
INT1FE
INT1 pin
OFF
0.5 s 0.5 s
Figure 22
INT Pin Output Timing During Power-on Detector Operation
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Seiko Instruments Inc.